Field-magnet winding for dynamo-electric machines.



F. R. KUNKBL.

R DYNAMO ELECTRIC MACHINES. APPLIOATION IILED SEPT. a, 1908.

FIELD MAGNET WINDING PO Patented June 29, 1909.

2 SHEETS-SHEET 1.

VEN OR wy/djw ATTORNEY WITNESSES:

I. R. KUNKEL. FIELD MAGNET WINDING POE DYNAMO ELECTRIC MACHINES. APPLIUATION FILED SEPT. B, 1908.

9%@,262, Patented June 29, 1909. I

2 SHEETS-SHEET 2v UNXTED ATEs PATENT ormon.

FRED R. KUNKEL, Oi EDGEWOOD PARK, PENNSYLVANIA, ASSIGNUH, BY MESNE ASSIGN- MENTS, TO WESTINGHOUSE ELECTRIC N MALIUFAO'IURING COMPANY, OF EAST PITTS- BURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

FIELD-MAGNET WINDING FOR DYNAMO-ELECTRIC MACHINES.

Specification of Letters Patent.

Patented June 29, 1909.

Application filed September 8, 1903. Serial No. 452,084.

To all whom it may concern:

Be it known that I, l nnn R. KUxKnL, a citizen of the United States, and a resident of Edgewood .Park, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement'in l ield-lllagnet VVindings for Dynamo-Electric Machines, of which the following is a specification.

My invention relates to dynamo-electric machinesand. particularly to field magnet structures and'windings thereof.

The object of my invention is to provide a field magnet winding for a dynamo-electric machine having its polar projections integral with the yoke and provided with enlarged integral extremities or shoes adja cent to the armature, the windingbeing such that it may be wound separate from the machine in. coil form and afterward readily and compactly applied to the polar projections.

Figure I of the accompanying drawing is a transverse sectional .view through a ZS- machine constructed in accordance with the present invention, and Figs. 2 and are perspective views illustrating, in a simple case, the mauner in which the present winding is applied to a polar projection.

The field magnet structure in connection with which the present invention is employed is composed of laminated sheet steel punchings 1 having integral inwardly extending polar projections 2 terminating in integral portions?) of ring-segment form that embrace almost the entire circumferenceof the armature, and the widths f which are much greater than the widths of the body portions of the projections.

Each polar projection is provided with a Winding 5 consisting ofa coil that is "formed into a plurality of loops surrounding the small body portion of the projection between its extremity and the yoke of the field magnet, atleast the lastloop being of sufiicient;

internallength to permit it to be applied over the enlarged extremity 3 of the pole ITIQCG'flftGI the other loops are in position.

The coils are woundbefore being applied to the machine and'cach consists of only a fraction of the number of convolutions of the completed win-dings. 5

I and 9.

As indicated in Fig. 2, each coil section may comprise two loops 6 and 7, opposite sides of which are connected by portions 8 In placing the coil section on the pole piece, the loop 6 is first applied by springing its sides apart sutliciently to enable them to slip over the end portion 3 of the pole piece and the portions 8 and l) are then bent until the loop 7 is in position to be pressed into place around the loop 6, as indicated in Fig. 3.

After all the core sections are in position they may be held therein by means of wedge blocks 10 of insulating material, as indicated in Fig. 1.

It is apparent that the winding herein set forth permits of the employment of the field magnet pun'chings or structures having integral projections with enlarged polar faces and of coil or form-wound windings that may be readily applied thereto, thus obviating the necessity, which has heretofore existed, of manually winding the coils directly upon the polar projections.

I claim as my invention:

1. In a dynamo-electric machine, the combination with a field magnet structure-com prising a polar projection having a small body portion and an enlarged end portion, of a winding therefor consisting of a coil formed of aplurality of loops surrounding the body portion of the pole, the final or outer loop being of sullicicnt internal pe-v ripheral length to permit the same to be applied over the end portion of the polar projection. j

2. In a dynamo-electric machine, the combination with a field magnet structure comprising a polar projection having a small body portion and an enlarged end portion, of a winding therefor consisting of a coil formed of a plurality of loops surrounding the body portion of the pole, the final or outer loop being of greater internal peripheral length than the periphery of the enlarged end portion. of the polar projection.

3. In a dynamo-electric machine, the combination with a field magnet structure comprising a polar projection having a small body portion and an enlarged, end ortion,

of a Winding therefor'consisting ot a coil formed of a plurality of loops one or more of which are of less internal peripheral subscribed my name this 3rd day of Septemlength than the enlarged portion of the ber,1908. polar projection and at least one of which f is of greater internal peripheral length than FRED KUNKEL' .5 the said enlarged portion of the polar pro- I NVitnesses: v

jection. BLRNEY HINEs,

In testimony whereofl I have herelintov W. T; BRANsoN; 

